Nichols — A Lid of the 21a)-ine Molla-wa af Ireland. 615 



iv. "Porcupine" Exp., 1869, 90-722 fms. (Jeffreys, '79): 11. I. A. 

 Exp., 188o, 70-79 fms. (Chaster, '98): E. I. A. Exp., 1888, 

 345 fms., portion of a valve (A. E,. [N".) : " Research " Trawling 

 Cruise, 1889, 400 fms., a single specimen (Bourne, '90). . 

 V. "Porcupine" Exp., 1869, 422 fms. (Jeffreys, '79). 



All the records, except perhaps some of the " Porcupine," refer to 

 var. septemradiata, Miiller. 



JDistrihition. — Einmark to Mediterranean. W. Africa and Canaries, 

 "Talisman" (Locard). 



\^Fecten aratus (Gmelin).] 

 .... v., . 

 v. " Porcupine " Exp., 1869, 173-208 fms. (Jeffreys, '79): a small 

 single valve, in a semi -fossil state, was taken by Captain Hoskyns 

 in 340 fms., off the west coast of Ireland (Jeffreys, '63). 

 Distrihdion. — Loffoden I. to "W. Africa. C. Yerd I. ? Mediter- 

 ranean. 



Pecten opercular is (Linne). 

 i., ii., iii., iv., v., vi. 

 Generally distriljuted and plentiful on sandy coasts. 

 Yar. lineata, Da Costa. Belfast Lough (Thompson, '56 ; Praeger, 

 '89) : Portmarnock and Wicklow coast (AYarren, f. Thompson, 

 '56): Dublin coast (Warburton, Whitelaw, & Walsh, '18) : Bray 

 (Brown, '18) : Cork and Bantry (Humphreys, '45). Yar. 

 Uimida, Jeffreys. Cork (Humphreys, f. Jeffreys, '63). Yar. 

 elongata^ Jeffreys. Birterbuy Bay (Barlee, f. Jeffreys, '63). 

 Distribution. — Iceland. Loffoden I. to Mediterranean. Azores, 

 ? Madeira. ? Canaries. 



Fecten maximus (Linne). 

 i., ii., iii., iv., v., vi. 

 Generally distributed in the laminarian zone and deeper water. 

 Distrihution. — J^orway to Y''. Afi'ica. ? Mediterranean. ? Madeira. 

 ? Canaries. 



Pecten tiger hvus, Miiller. 

 i., ii., iii., iv., v., vi. 

 i. Generally distributed, but not common. 



ii. Portmarnock (rare, Brown, '18 ; Miss AYillan and Hart, f. Hart, 

 '92) : Ireland's Eye, valves (Hart, '92) : Dublin Bay (Turton, 

 '19 ; Kinahan, '61) : Dalkey Sound and Killiney Bay (Walpole, 

 '53a): Bray (Brown, '18 ; Walpole, '53a): Greystones (Mackin- 

 tosh, '84). 



